How can I use the mongo_run_command function to rename a collection of MongoDB in C?

Asked Oct 04 '13 at 16:56

Active Feb 25 '14 at 10:07

Viewed 198 times

I'm trying to rename a collection in a C program but this don't work:

commandData = (bson *) malloc(sizeof(bson));
commandOut = (bson *) malloc(sizeof(bson));

int result;

bson_init(commandData);
bson_init(commandOut);
bson_append_string(commandData, "renameCollection", "pru.collecPRU");
bson_append_string(commandData, "to", "pru.collecOK");
bson_append_bool(commandData, "dropTarget", 1);

result = mongo_run_command(conn, "admin", commandData, commandOut);

if(result != MONGO_OK) {
  fprintf(stderr, "%s Rename ERROR\n", dateTime);
  bson_destroy(commandOut);
  free(commandOut);
}

bson_destroy(commandData);
free(commandData);

Can someone help to me?

edited Feb 25 '14 at 10:07

mortiped

asked Oct 04 '13 at 16:56

APM

Any error codes? It's not a sharded collection, is it? – WiredPrairie Oct 04 '13 at 19:19
In commandOut returns a 1 but result is not MONGO_OK, and it's not a sharded collection. – APM Oct 07 '13 at 07:56
Sorry, I didn't write the declaration, is an integer: int result; – APM Oct 07 '13 at 13:40
What's the value of `result` when `commandOut` is a `1`? What's the error code? – WiredPrairie Oct 07 '13 at 14:22
The value of result is -1 – APM Oct 07 '13 at 16:02
Oh, that's very disappointing as it's not a specific error code. Does the exact same `rename` work if you try it from the MongoDB console? – WiredPrairie Oct 07 '13 at 16:30
Yes, in mongo console works fine with that command: db.pru.collecPRU("collecOK", true) – APM Oct 07 '13 at 16:36
I don't find any use example of function: mongo_run_command(), I don't know if I'm doing a bad use of it. – APM Oct 07 '13 at 16:39
could you try calling `mongo_cmd_get_prev_error(conn, "admin", &out) where out is a `BSON` object after the error occurs? – WiredPrairie Oct 07 '13 at 17:20
Hi, mongo_cmd_get_prev_error returns 0 – APM Oct 08 '13 at 08:56
The result is the same passing the db 'pru' or 'admin' to mongo_run_command function, I don't know if I'm doing a bad use of this function, I don't see an specefic one to rename collections. Thanks. – APM Oct 08 '13 at 09:07
I'm out of ideas. The C driver is frustratingly lacking in documentation. – WiredPrairie Oct 08 '13 at 10:55
I think the same, it's frustrating (I read the API to found functions), and I don't found any example of use of this function, even invoquing another command... Thanks for your interest. – APM Oct 08 '13 at 14:32
There are examples/tests in the github repository that do other commands. Just not `renameCollection`. – WiredPrairie Oct 08 '13 at 14:49
Thanks, I will see them. – APM Oct 10 '13 at 07:28

How can I use the mongo_run_command function to rename a collection of MongoDB in C?

0 Answers0